The film is a wonderful portrayal of a dark triangle involving identical twins who form an elegant acrobatic circus act and eventually seek revenge on an unfaithful women. They plan a "perfect crime" on which the film turns. I have not seen the film in about 50 years. It used to show up on local TV quite frequently in the 50's but seems to have disappeared and unjustly so. I only hope it still exists? If it is available I do urge it's viewing.
Lom plays the dual role of the twin brothers and this , in itself , is cleverly handled. The O'Henry like ending is affecting and again gives the film a further degree of individuality.